Re^8: treat files with umlauts (utf)

The OP's posted code does not include an assignment to $scandir

It does not, but the OP does mention UTF-8, so $scandir being UTF-8 is a possibility, to say the least.

The OP's posted code does not contain umlauts

It doesn't have to be umlauts, what matters is whether $scandir is UTF-8. Make this change to your code and see what happens:

use utf8; # just for utf8::upgrade

# bytewise, this is already UTF-8...
my $scandir = './pm_1080490_utf8_readdir';

#... but we need to flag it as such for
# the problem to manifest itself:
utf8::upgrade $scandir;
# now on to readdir
[download]

the OP's posted code does not require use utf8

Right, it does not. And use utf8 is not absolutely necessary in the above test code - use -CS/binmode or -CA to initialize $scandir.

If you're referring to the output from that containing: FLAGS = (PADMY,POK,pPOK,UTF8) Then the UTF8 part of that is caused by the umlaut in 'für'.

Does that code not answer your:

[use utf8] has nothing to do with the:... flagging variables

# under 'use utf8'
    FLAGS = (PADMY,POK,pPOK,UTF8)
    ... "f\303\274r"\0 [UTF8 "f\x{fc}r"]
# no utf8
    FLAGS = (PADMY,POK,pPOK)
    ... "f\303\274r"\0
[download]

Does the first variable have the UTF8 flag or does it not? What about the second variable? Aren't those two strings exactly the same?
I'm out of this thread.

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Re^9: treat files with umlauts (utf)
by mike.scharnow (Initiate) on Apr 07, 2014 at 08:25 UTC

Hello all!

Thank you all for your ideas and for your discussion, which taught me some more internals abuot UTF-Handling. I hope I will be able to work in the Umlaut field without further problems.

as to the cause of the problem (as I understand it now): You gave me the correct hints: it was not the problem of readdir but the problem of $scandir.

I have a configuration xml file, which I read in using XML::Simple. $scandir is read from this file using something like my $scandir = $config->{external_systems}->{filesIN}.

Now, the config file is stored in ISO-8859-1. It seems that in this construction, $scandir is not stored as UTF, but as ISO-8859-1, although there are no umlauts in the directory name!

Now, when I concat $scandir with the result of readdir, it seems that a non-utf-value (from xml file) is concatenated with an utf value (from readdir). And as soon as there is an umlaut in the filename, the resulting string is invalid, causing "-f" to say "this is not a file".

I solved it by writing

my $scandir = …;
utf::downgrade($scandir);
[download]

Hoping that this is the "correct" way of dealing with the problem and again thanks very much

Mike

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